Shuttle for embroidering-machines.



J. GRANZ.

SHUTTLE FOR EMBROIDERING MACHINES. APPLICATION FILED MAY26.1915.

1 ,1 99,781 Patented Oct. 3, 1916.

UNITED s'ra as PAEN. o

JOSEF ennnaor PLAUEN, GERMANY, ASSIGNOB T0 voGTLANDIso MASCHINEN- FABRIK, or PLAUEN, GERMANY.

SHUTTLE FOB, EMBROIDERING-MACHINES.

Specification of Letters Patent.

Patented Oct. 3, 1916.

Application filed May 26, 1915. Serial No. 30,708.

To all whom it may concern Be it known that I, Josnr GRANZ, a subject of the German Emperor, residing at Plauen, in Vogtland, in the Kingdom of Saxony, Germany, have invented certain new and useful Improvements in Shuttles for Embroidering-Machines, of which the following is a specification.

The present invention relates to shuttles for embroidering machines and constitutes a solution of the problem to enlarge the inner space of a shuttle with the object of increasing its thread capacity without'materially changing the form of the shuttle from that of the old shuttles which have been found satisfactory.

According to this invention, the shuttle maintains practically its original form, that is, the cover as before is on the sole side of the shuttle, but the rear face of the shuttle is considerably curved so that it will project beyond the outline of the sole of the shuttle, for the purpose of accommodating the vaulted part of the bobbin. The loweredge of the abnormally curved portion on the rear face of the shuttle is parallel or substantially parallel to the border of the shuttle race as with the old shuttles, so as to constitute a bearing edge.

To make my invention more clear, the same is illustrated in the accompanying drawing, in which similar reference characters denote corresponding parts 'and in which by way of example two forms of construction are illustrated, Figure 1 being a bottom plan view of one form of my improved shuttle and Figs. 2 and 8, respectively, being a rear view and a cross section thereof; Fig. 4 a similar view as Fig. 1 of a modified form of my shuttle and Figs. 5 and 6, respectively, a side or rear View and a cross section thereof.

Referring to Figs. 1-3 the rear face of the shuttle is considerably curved outwardly, as at 1, so as to enable the shuttle to accomdate the vaulted or thickest part of the bobbin (not shown). This curved face projects beyond the outline of the sole of the shuttle in which the cover 5 is arranged, as in the old shuttles. In order not to widen the race 2 (Fig. 3) more than is necessary for the hitherto used shuttles, the part below the curvature on the rear face of the shuttle is cut out to about the height of the border 3 of the shuttle race 2 forming an opening 6. The cover 5 is provided with a downwardly projecting rib or edge 4: which is adapted to close the opening 6 and at the same time replace that part of the bearing edge of the shuttle which has been destroyed by the cut out portion.

This structure constitutes a practical solution of the problem mentioned in that it enlarges the thread capacity while the form of the shuttle is not materially changed, so that the working and wearing conditions remain practically the same as with the old shuttles. But with this structure the crevices 6, 6 formed between the edge 4 ofthe cover and the side edges of the cut out portion (Fig. 1) are apt to catch the tautly stretched needle loop while sliding over the body of the shuttle which may cause the tearing of the thread. To prevent that one side 8 of the cut out portion, is bent inwardly, as at 11, to overlap the end 10 of the edge f of the cover 5 and at the opposite end, as at 10', the edge 4 of the cover is bent inwardly to overlap the side 9 of the cut out portion. The corners of the bent parts 11 and 10, as it will be seen, are rounded so that the thread loop sliding over the shuttle will smoothly pass over the body thereof. The tautly stretched loop on slipping into any of the crevices 7, 7 will be caused by the rounded corners to quickly pass out therefrom.

In order to prevent the cover 5 from being bent when it is being closed, owing to its pressure against the thickest part of the bobbin the cover is provided at the end opposite the edge 4: with a reinforcing rib 12 that extends inwardly into the shuttle so that the cover in cross section may substantially resemble a Z lying on its side. Any other suitable form may, of course, be employed.

What I claim and desire to secure by Letters Patent is:

A shuttle for embroidering machine, as an article of manufacture, having a cover in which the rear face is considerably curved outwardly to project beyond the outline of t e o e nd in h ch the part elow said curvature is out out and the cover has a In testimony whereof I afiix my signature PIOJGCtlIlg edge coverlng the out out portion, 1n presence of tWo Witnesses.

the sides of the latter and the ends of said r edge being bent to overlap one another and JOSEF GRANL' to form rounded corners to prevent the Witnesses:

thread from tearing, substantially as and GOTTWALT LIEBER,

for the purpose set forth. R. H. NIER.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

